UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Income tax effect on unrealized gains (losses) on hedging instruments	$ 1	$ 5	$ 2	$ 7
Income tax effect on amortization of net loss and prior service cost previously recognized	$ 8	$ 4	$ 20	$ 14